13969279 has 4 divisors (see below), whose sum is σ = 13993200. Its totient is φ = 13945360.

The previous prime is 13969247. The next prime is 13969289. The reversal of 13969279 is 97296931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97296931 = 67 ⋅1452193.

It is a cyclic number.

It is not a de Polignac number, because 13969279 - 2⁵ = 13969247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13969289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11062 + ... + 12259.

It is an arithmetic number, because the mean of its divisors is an integer number (3498300).

Almost surely, 2^13969279 is an apocalyptic number.

13969279 is a deficient number, since it is larger than the sum of its proper divisors (23921).

13969279 is an equidigital number, since it uses as much as digits as its factorization.

13969279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23920.

The product of its digits is 183708, while the sum is 46.

The square root of 13969279 is about 3737.5498658881. The cubic root of 13969279 is about 240.8378068823.

The spelling of 13969279 in words is "thirteen million, nine hundred sixty-nine thousand, two hundred seventy-nine".